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A Level 2 Narrative

Last Sunday I was cooking twelve sausages on the barbeque because there were four of us for lunch. Just them my four neighbours turned up and decided to stay for lunch. I was just wondering how to share the sausages when two old friends arrived and they stayed for lunch too. It wasn't a very big lunch.

Well I think I'll buy more sausages this weekend but I am wondering how many to buy so that I can be certain that I will be able to share them easily with different numbers of people. What number of sausages do you think I should buy this weekend?